Mole Review

What is Avogadro's number?

• 6.022 x 10²³

• 1 mole

• 60.22 x 10²³

• 6.022

Tags

NGSS.HS-PS1-7

How many moles are in 8.30 X 10²³ molecules of H₂O?

• 1.378 X 10²³ moles H₂O

• 1.378 moles H₂O

• 4.998 x 10⁴⁷ moles H₂O

• 0.725 mole H₂O

How many molecules are there in 31.8 moles of water?

• 5.281 x 10^-23 molecules

• 1.914 x 10²⁵ molecules

• 5.281 x 10^-25 molecules

• 1.893 x 10²² molecules

What is the conversion factor that should be used to determine how many molecules are there in 4.00 moles of glucose, C₆H₁₂O₆?

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Tags

NGSS.HS-PS1-7

How is moles abbreviated?

• M

• m

• mol

• ml

What is the mass of AuCl₃?

• 196.967 g

• 232.42 g

• 214.227 g

• 303.326 g

What is the mass of 0.89 mol of CaCl₂?

• 110.984 grams

• 0.008 grams

• 124.701 grams

• 98.775 gram

Calculate the mass of 5.0 mol of iron.

• 8.3 x 10^-24 g

• 11.186 g

• 3.0 x 10²⁴ g

• 279.665 g

How many moles are in 19.82 g Mg?

• 1.226 mol Mg

• 481.725 mol Mg

• 1.000 mol Mg

• 0.815 mol Mg

What is the percent composition by mass of sulfur (S) in the compound MgSO₄?

• 20.22%

• 19.85%

• 26.64%

• 28.64%